IDL: Enumerations support in dictionaries

Source/bindings/scripts/v8_dictionary.py

Index: Source/bindings/scripts/v8_dictionary.py
diff --git a/Source/bindings/scripts/v8_dictionary.py b/Source/bindings/scripts/v8_dictionary.py
index 69fd1c082bb946f79594e24767d3281f697c7ee3..6ea01cd2dfbd3f2ca8efbc31c915b3bdf867a21a 100644
--- a/Source/bindings/scripts/v8_dictionary.py
+++ b/Source/bindings/scripts/v8_dictionary.py
@@ -18,6 +18,7 @@ DICTIONARY_H_INCLUDES = frozenset([
 ])
 
 DICTIONARY_CPP_INCLUDES = frozenset([
+    'bindings/core/v8/ExceptionState.h',
     # FIXME: Remove this, http://crbug.com/321462
     'bindings/core/v8/Dictionary.h',
 ])
@@ -75,6 +76,7 @@ def member_context(member):
             cpp_value='impl->%s()' % member.name, isolate='isolate',
             creation_context='creationContext',
             extended_attributes=member.extended_attributes),
+        'enum_validation_expression': idl_type.enum_validation_expression,
         'has_method_name': has_method_name_for_dictionary_member(member),
         'name': member.name,
         'setter_name': setter_name_for_dictionary_member(member),
@@ -106,7 +108,7 @@ def member_impl_context(member, interfaces_info, header_includes):
 
     def has_method_expression():
         if (idl_type.impl_should_use_nullable_container or
-            idl_type.is_string_type):
+            idl_type.is_enum or idl_type.is_string_type):
             return '!m_%s.isNull()' % member.name
         else:
             return 'm_%s' % member.name